26778654 has 32 divisors (see below), whose sum is σ = 68010240. Its totient is φ = 7650936.

The previous prime is 26778641. The next prime is 26778659. The reversal of 26778654 is 45687762.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26778659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35044 + ... + 35799.

It is an arithmetic number, because the mean of its divisors is an integer number (2125320).

Almost surely, 2^26778654 is an apocalyptic number.

26778654 is an abundant number, since it is smaller than the sum of its proper divisors (41231586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26778654 is a wasteful number, since it uses less digits than its factorization.

26778654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70861 (or 70855 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 26778654 is about 5174.8095617134. The cubic root of 26778654 is about 299.1779495007.

The spelling of 26778654 in words is "twenty-six million, seven hundred seventy-eight thousand, six hundred fifty-four".